I had the idea of becoming the poster of Office Space, covered in post-it notes.

http://www.bangitout.com/uploads/90office_space.jpg

However, I imagine not many people would get it and just be puzzled by it, considering it's not even in the movie. I just know wherever I go there will be 20 jokers, and I figure I might as well go as Rorschach from Watchmen now since next year it'll be the new Joker-ish zeitgeist.